package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {

	public static void main(String[] args) throws IOException {
		if (args.length < 3){
			System.out.println("Please specify parametrs: <amount of test data> <file> <format>");
			return;
		}
		
		int amount = Integer.parseInt(args[0]);
		File file = new File(args[1]);
		String format = args[2];
		
		if (file.exists()){
			System.out.println("File exists, please remote it manually: " + file);
			return;
		}
		
		List<ContactData> contacts = generateRandomContacts(amount);
		if ("csv".equals(format)){
			saveContactsToCsvFile(contacts, file);
		} else if ("xml".equals(format)) {
			saveContactsToXmlFile(contacts, file);
		} else {
			System.out.println("Unknow format " + format);
			return;
		}
	}
	
	private static void saveContactsToXmlFile(List<ContactData> contacts, File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();
	}
	
	public static List<ContactData> loadContactsFromXmlFile(File file) {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);
	}

	private static void saveContactsToCsvFile(List<ContactData> contacts, File file) throws IOException {
		FileWriter writer = new FileWriter(file);
		for (ContactData contact : contacts) {
			writer.write(contact.getFirstname() + "," + contact.getLastname() + "," + contact.getAddress() + "," +
					contact.getHomePhone() + "," + contact.getMobilePhone() + "," + contact.getWorkPhone() + "," + 
					contact.getEmail() + "," + contact.getEmail2() + "," + contact.getBday() + "," + contact.getBmonth() + "," + 
					contact.getByear() + "," + contact.getSecondaryAddress() + "," + contact.getSecondaryPhone() + ",!" + "\n");
		}
		writer.close();	
		
	}
	
	public static List<ContactData> loadContactsFromCsvFile(File file) throws IOException {
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(reader);
		String line = bufferedReader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData()
				.withFirstname(part[0])
				.withLastname(part[1])
				.withAddress(part[2])
				.withHomePhone(part[3])
				.withMobilePhone(part[4])
				.withWorkPhone(part[5])
				.withEmail(part[6])
				.withEmail2(part[7])
				.withBday(part[8])
				.withBmonth(part[9])
				.withByear(part[10])
				.withSecondaryAddress(part[11])
				.withSecondaryPhone(part[12]);
			list.add(contact);
			line = bufferedReader.readLine();
		}
		bufferedReader.close();
		return list;
	}

	public static List<ContactData> generateRandomContacts(int amount) {
		List<ContactData> list = new ArrayList<ContactData>();
		
		for (int i = 0; i < amount; i++) {
			ContactData contact = new ContactData();
			RandomDate date = new RandomDate();
			contact.withFirstname(generateRandomString())
			.withLastname(generateRandomString())
			.withAddress(generateRandomString())
			.withHomePhone(generateRandomPhoneNumber())
			.withMobilePhone(generateRandomPhoneNumber())
			.withWorkPhone(generateRandomPhoneNumber())
			.withEmail(generateRandomEmail())
			.withEmail2(generateRandomEmail())
			.withBday(String.valueOf(date.day))
			.withBmonth(date.month)
			.withByear(String.valueOf(date.year))
			.withSecondaryAddress(generateRandomString())
			.withSecondaryPhone(generateRandomPhoneNumber());
			list.add(contact);
			
		}
		return list;
	}
	
	public static String generateRandomString() {
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0){
			return "";
		} else {
			return "test" + rnd.nextInt();
		}
	}
	
	public static String generateRandomEmail() {
		return generateRandomString() + "@" + generateRandomString() + ".com";
	}
	public static String generateRandomPhoneNumber() {
		StringBuilder phone = new StringBuilder();
		phone.append("+7 (")
		     .append(generateRandomNumberInRange(100, 999))
		     .append(") ")
		     .append(generateRandomNumberInRange(100, 999))
		     .append(" - ")
		     .append(generateRandomNumberInRange(10, 99))
		     .append(" - ")
		     .append(generateRandomNumberInRange(10, 99));
		     
		
		return phone.toString();
	}
	
	public static int generateRandomNumberInRange(int startRange, int endRange) {
		Random rnd = new Random();
		return rnd.nextInt(endRange - startRange) + startRange;
	}

}
